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黝麟“浅埋挖法”喷射混凝土及前门3号(浅埋暗挖法)、4号(盖挖法)地下人行通道正在施工@及学勇
Sham Shui “Shallow Buried Law” shotcrete and the front door No. 3 (shallow burying method), No. 4 (cover digging method) underground pedestrian passage under construction @ and Xue Yong